560 president's address. 



They have been strongly folded along persistent east and west 

 axes, and are vertical in places. 



(3) In the Kimberley District of West Australia the Cambrian 

 rocks are described by Mr. H. P. Woodward* as forming a belt, 

 which strikes N.E. and S.W. from the Burt Range to the south- 

 ward of Mt. Dockrell. They consist of crystalline limestones, 

 sandstones, grits, quartzites, clay slates and sandy flags. 



The principal gold deposits have been discovered in this forma- 

 tion, which, as already stated, contains Salterella Hardmani and 

 Olenellus Forresti. 



(4) In Tasmania a considerable thickness of rocks has been 

 classed by Mr. R. M. Johnstonf and others as Cambrian. They 

 are probably Upper Cambrian. He divides them into three 

 groups, arranged in the following descending order :- — 



(a) Primordial Calciferous Group. Limestones of the Chud- 

 leigh, Belvoir, Ilfracombe, &c. 



(h) Magog Group. Sandstones and alum schists of Chudleigh, 

 Magog Range, &c. 



(c) Dikellocephalus Group of Caroline Creek, near Latrobe. 



The latter group alone has yielded fossils. It consists of rusty 

 quartzites with abundant casts of fossils, micaceous purple clay 

 slates and breccias, and purplish-grey quartzites. 



At Caroline Creek I observed the dip to be about S.W. at 33°. 



Mr. Johnston gives| the general dip in the same locality as 

 E. 30° N. at 45°. Mr. Gould states that the general dip is 

 northerly, differing from that of the neighbouring Archaean schists, 

 whose strike is generally West of North. 



As far as my own limited observations extended, the general 

 trend of the folds in this series agreed approximately with that of 

 the Archaean Series. 



* Western Australia. Report on the Goldfields of the Kimberley 

 District, by Harry Page Woodward. By authority. Perth, 1891, p. 10. 



t Geology of Tasmania, by R. M. Johnston, F.G.S., &c. By authority. 

 Hobart, 1888, pp. 16-32. 



X Loc. cit. p. 36. 



